Stove.



FLL' Y BVM F. MADSEN.

sToVB. I APPLICATION FILED APILG, 1909.

934,733.9s 4 Patented sept. 21, 1909;

A'TORIIEYS FRANDS MADSEN, OF WILBUR, WASHINGTON.

STOVE.

Application filed April 6, 1909.

To all whom it may concern:

Be it known that l, FRANDs ject of the King of Denmark, of lVilbur, inthe county of Lincoln and State of lVashington, have invented certainnew and useful improvements in Stoves, of which the following is a full,clear, and eX- act description.

The present invention has for its principal objects the following:lirst. to increase the available radiating surface in a stove; second.to cause t'he heated gases to maintain closer and more intimate contactwith the metal of the radiating surfaces; third. to regulate the outputin heat of the radiator.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure l is a vertical section of a stove constructed in accordance with-my invention; Fig. 2 1s a cross section of the stove taken on the lineMADsEN,

and a resident 2-2 in Fig. l; and Fig. 3 is a plan of a grating forpractically covering the upper opening of theinternal radiating chamber.

rl`he structure as shown may be divided into groups of parts relating tothe fire pot- A, the radiator section B, and the flue C.

The present invention relates more particularly to the radiator section.The fire pot A, the ash pan D, the tire door E, the ash door F, gratebars G and flue C are all of the usual form and construction.

The radiator section B diers in the employment of the internal chamber Hwith its regulating cover l and deflector K. Also in the forming, by theuse of the chamber H, the annular passage L, for the heated gases ofcombustion, and by the use of the perforated cover M, to regulate theexit of the said gases from said passage.

The chamber H is provided with the closed bottoni shown and issubstantially cylindrical in form. In size the chamber is of a diameterto approach the outer walls of the stove, close enough to spread theheated gases in a thin layer while not choking the draft. By thusspreading the gases, the contained heat is brought in closer contactwith the metal walls of the radiator section. By thus bringing the totalvolume of heated gas in closer contact with the metal, a largerproportion of such heat is transferred to the metal.

Specification of Letters latent.

Patented Sept. 2i., 19ml.

serial No. 488,190.

The lower end of the chamber H is eX- a subl tended downward toward thefire bed, the

object being to introduce the blue flame of initial combustion upon themeta-l of the chamber H. To permit this extension of the chamber,without interfering with the introduction of the coal into the stove,the wall of the chamber' is retracted at N, as shown in Fig. l.

The heated gases on rising from the fire would naturally be drawndirectly to the flue C. lf unrestrained, this would leave the upperportion of the radiator section-both internal and externalwalls-farthest removed from the flue, comparatively cool. Tt isdesirable to distribute the heated gases so that the more rapid movementof the smaller quantity of the gases near the flue will be compensatedby the larger volume passing more slowly from the radiator at a pointremoved from the flue. Therefore, l provide the perforations O, U, whichare larger than the perforations l?, P on the side of the stove removedfrom the flue, as shown in Fig. 2 of the drawings.

The perforations in the cover I may be partially or entirely closed byusing a suitable lid. The cover is sometimes removed, to be replaced bya suitable pipe or drum for conveying off the heat radiated in thechamber H, for use in warming a room at a distance from the stove. `Whenthis substitution of the lid by a heat duct is made, the deliector K islikewise removed; thus a double use of the stove may be obtained.

Having thus described my invention, claim as new and desire to secure byLetters Patent:

l. A stove, comprising a cylindrical body portion vertically disposed,having a firepot and a side-opening feed door, a flue for the productsof combustion, opening from the top of said body portion, a hollowchainber adapted to partially fill the interior of said body portion toform contracted passages between the vertical walls of said chamber andsaid body portion, the said hollow chamber' having closed bottom andside walls and contracted at the upper portion to form an annularchamber for the conveyan ce of the products of combustion to the saidflue, said hollow chamber opening outward from said body portion and atthe top thereof, and a partition adapted to hold said hollow chamberwithin said body portion equally distant from the walls of said bodyportion, and perforated, said perforations being graduated to induce thepassage of a portion of the products of combustion into the said annularchamber at the side of the stove removed from said iue.

2. A stove, comprising a cylindrical body portion vertically disposed,having a lire-pot and a side-opening feed door provided with a flue forthe products of combustion, open` ing` at the top of said body portion,a hollow chamber adapted to partially ll the interior of said bodyportion to form a contracted passage between said body portion and thesaid chamber, said chamber having closed sides and bottom, and acontracted, neck-like portion at the top thereof opening outside thesaid body portion and forming within said body portion an annularchamber for the products of combustion, a partit-ion adapted to hold thesaid hollow chamber within said body portion equally distant from thewalls of said body portion, and provided with perforations graduated toinduce a portion of the products of combustion open end of said chamberto deflect the heat` rising from said chamber, horizontally from saidbody portion.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing,` witnesses.

FRANDS MADSEN.

Witnesses:

C. MORUP NELSEN, RUDOLPH M. RAsMUssEN.

